Lubricator



(No Model.)

J. L. GRANDI'SON.

LUBRIGATOR.

Patented-Nov. 25, 1890.

FIG.2.

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UNIT D STATES PATENT OFFICE.

JAMES L. GRANDISON, OF MANCHESTER, ENGLAND, ASSIGNOR OF ONE-HALF TO P. J. MCMAHON, OF NEWV ORLEANS, LOUISIANA.

LUBRICAT'OR.

SPECIFICATION forming part of Letters Patent N0. 441,407, dated November 25, 1890.

Application filed January 29, 1890. Serial No. 338,543. (No model.)

To all whom it may concern:

Be it known that I, J AMES LIONEL GRANDI- SON, a subject of the Queen of Great Britain, residing at Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Lubricators, of which the following is a specification, reference being had therein to the accompanying drawings. 1o This invention relates to certain new and useful improvements in lubricators of that class known as sight-feed lubricators, and it has for its object, among others, to provide a lubricator of this class which in its general construction shall embody improvements upon the prior devices having provision to prevent the escape of steam in case of breakage'of the glass, thus avoiding injury to the engineer or other person in case of accident. It aims, also, to provide for the displacement of the oil by direct pressure acting upon the under side of the piston, whose surfaces are i of unequal areas.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the appended claims, the novelty re siding in the peculiar combinations and the construction, arrangement, and adaptation 0 of parts whereby the above ends are accomplished, all as more fully hereinafter set forth.

The invention is clearly illustrated in the accompanying drawings, which, with the let.

ters of reference marked thereon, form a part of this Specification, and in which- Figure 1 is a top plan of my improved lubricator. Fig. 2 is a like view showing but.

one sight-feed. Fig. 3 is a side view with 4 parts broken away and in section of the device shown in Fig. 1. Fig. et is a vertical section through Fig. 2. Fig. 5 is an enlarged cross-section on the line 0: cc of Fig. 3.

Like letters of reference indicate like parts throughout the several views.

Referring now to the details of the drawings by letter, A designates the cylinder of the lubricator, in which reciprocates the piston O,provided with a packing 0', preferably 5 of asbestus, although other suitable materials may be used, and connected with this piston, preferably, by means of a screw-threaded end engaging a screw-threaded boss 0 Upon the upper face of the piston is the hollow piston-rod B, provided with a plurality of holes R near its lower end, through which the oil flows from the interior of the hollow piston-rod into the cylinder when charging the same.

N is a packing-ring of any suitable mate- 6o rialsuch as woodite, vulcabeston,-or any other material adapted for the purpose-'to allow the piston-rod to reciprocate. Upon the upper end of the cylinder is an internallythreaded boss A, formed with a shoulder A upon which said packing-ring rests, and B is a cup-shaped cap externally threaded to engage the threads of said boss, and serves also as a drip-cup. It is screwed down upon the top of the packing-ring, as shown in Fig. 4:. Upon the upper end of the piston-rod B there is screwed a filling-cup D, which has a screw threaded engagement with the said rod, and has an aperture therein, as shown, the said aperture being closed by means of the plug D, having a suitable handle by which it may be turned to remove it when desired.

E is a passage-way or aperture from the cylinder, and is governed by means of the valve E, which should be opened for the escape of air while filling the cylinderA of the lubricator, but should be closed after the said cylinder has been filled.

F is a valve for regulating the flow of oil 8 5 from the lubricator A to the engine through the sight-feed glass hereinafter described. This sight-feed glass G is carried in a suitable socket piece or support or guard G, as shown in Fig. 4:, and has extending up a short 0 distance within the same the nipple G formed on the part provided with the valve F, and through the passageway G of which the oil is designed to pass. The turning of the valve F determines the quantity sup- 5 plied to the engine, and this may be varied from one drop to sixty per minute, more or less. To the top of this guard G is affixed a piece H, the aperture in the upper end of which is closed by means of a plug H, which, I00

' when removed, provides for the filling of the I the pipes S and the passage-way K. This valve is of a shape other than circular, as seen in Fig. 5, so that while it may be seated at its corners to rest upon the seat in, as seen in Fig. 5, passage-ways m for the passage of the oil will be provided, as seen in said Fig 5; but should the glass be broken from any cause the pressure of steam will force upward the valve against its seat m3. (see Fig. 3) and serve to prevent sudden rush of steam. from the engine.

M are suitable packing-rin gs at the top and bottom of the glass tube G to render the same perfectly tight at the ends.

S is a pipe leading from the oil-outlet Q to the steam pipe or other device to which the oil is to be led through the passage K in the .nipple or pipe K, which is provided with a passage L in addition to'said passage K, and this passage L forms the steam-inlet to the under side of the piston C through the pipe K and the passageway J is a valve to regulate the pressure of steam through said pipe K onto the bottom of the piston C.

Leading from the bottom of the cylinder A is a passage-way P, controlled by means of the valve I, and is for the purpose of drawing cit the water of condensation, which accumulates during the working of the lubricator, which water of condensation should be drawn off before the cylinder is charged.

Two 01' more cylinders may be fed from the same lubricator by attaching one or more sightfeeds like the one above described and operating in a similar manner. I have indicated such construction in dotted lines in Fig. 1.

The operation is simple and will be readily understood. The motive power is the difierence of area of the piston above and below, being greater upon theunder side. The action of the lubricator is thus positive and is not liable to derangement, as with ordinary sight-feed devices. The piston rising and falling with the amount of oil in the cylinder, its rod serves'as'a tell-tale to indicate the gradual consumption of the oil and showing when it requires to be replenished. The apparatus being operated by the positive pressure of the steam, it can be regulated with great precision to deliver large or small quantities of oil. 'There is no water of condensation to come into contact with and mix with the oil. Hence the sight-glasses do not become soiled and breaking of the glasses. is avoided, due to the absence of temperatures that would cause unequal expansion or contraction of said glass and guard.

In order to charge the lubricator, the valve J is closed, shutting off the pressure of steam through the pipe K The valve I is opened to draw off the water of condensation within the cylinder A and the piston C forced down to the bottom of said cylinder, the valve E previously having been opened to admit air to the upper face of the piston. The valve I is then closed, the plug D removed from the upper end of the piston-rod B, and oil poured into the cup D, which runsdown through the piston-rod B to the openings at B, when it fills the cylinder, forcing the air out through the valve untilthe oil has reached that point.

Then the valve E is closed, the plug D replaced, the valve J opened, and the feed goes on as usual until the piston-rod B again indicates the necessity for a charge by its elevation above the top of the cup B.

Having thus described my invention in its preferable form, what I claim as new is' 1. I11 a lubricatorof the class described, the combination of the cylinder, the piston, and

its hollow piston-rod apertured at or near its lower end, and a boss at the upper end of the cylinder, having a shoulder A the conical packing-ring supportedon said.shou1der,and the cup-shaped cap within the boss andbearing on the packing-ring, with a space-surrounding said ring, with a valve-controlled passage-way E from the cylinder adjacent to said packing-ring, substantially as described.

2. In a lubricator of the class described, the combination, with the cylinder and piston,'of the valve-controlled steam-passage tothe-under side of the piston, the valve-controlled outlet from the upper end of thecylinden the air-inlet valve at the upper end of thecylinder, said cylinder having a'valve-controlled' outlet at the bottom thereof, the drip-cup, plug, and filling-cup at the upper end of the piston-rod, all substantially as and for the purpose specified.

In testimony whereof Iaffixm y signature in presence of two witnesses.

' JAMES L. GRANDISON Witnesses:

HENRY JAMES HUDD, H. S. OBRIEN. 

